摘要
针对磁流变阻尼器(MRD)减振系统对于电源脉冲功率输出性能的要求,基于超级电容与铅酸电池能量密度和功率密度方面存在的互补性,提出双向Buck-Boost变换器耦合混合储能方案,对混合电源脉冲响应性能进行研究。根据物理储能和化学储能电源特性,设计混合储能系统主电路结构,利用交流小信号法建立变换器数学模型,并对变换器输出进行主动闭环控制。使用PLECS分别对铅酸电池电源系统和混合电源系统模型输出性能进行仿真比较,最后搭建实验平台进行验证。仿真及实验结果表明,相比于铅酸电池电源系统,混合电源系统直流母线受到脉动功率冲击时,超级电容能够补偿70%以上的脉冲功率分量,维持母线电压稳定,降低铅酸电池输出电流波动率,有利于改善电池工况,延长化学电源寿命,提高MRD系统后备电源可靠性。
Aiming at the requirement of power pulse power output performance of magnetorheological damper(MRD)damping system,based on the complementarity between ultra-capacitor and lead-acid battery energy density and power density,a two-way Buck-Boost converter coupled hybrid energy storage scheme is proposed.According to the characteristics of physical energy storage and chemical energy storage power supply,the main circuit structure of the hybrid energy storage system is designed.The mathematical model of the converter is established by the AC small signal method,and the output of the converter is actively closed-loop controlled.Finally,the PLECS is used to simulate the lead-acid power system and the hybrid power system model.The results show that compared with the lead-acid battery power system,when the DC bus of the hybrid power system is subjected to the pulsating power impact,the ultra-capacitor can quickly compensate more than 70%of the pulse power component,maintain the bus voltage stability,and avoid the disturbance of the normal operation of the load.The hybrid system can significantly reduce the output current fluctuation rate of the lead-acid battery,which is beneficial to improve the working conditions,prolong the life of the chemical power supply,and improve the reliability of the backup power supply of the MRD system.
作者
王龙飞
冯志敏
孙捷超
WANG Long-fei;FENG Zhi-min;SUN Jie-chao(Ningbo University,Ningbo 315200,China;不详)
出处
《电力电子技术》
CSCD
北大核心
2020年第6期90-94,共5页
Power Electronics
基金
国家自然科学基金(51675286)。
关键词
变换器
磁流变阻尼器
超级电容
混合储能系统
converter
magnetorheological damper
ultra-capacitor
hybrid energy storage system
